package com.google.code.gossip.examples;


import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.ArrayList;

import com.google.code.gossip.GossipMember;
import com.google.code.gossip.GossipService;
import com.google.code.gossip.GossipSettings;
import com.google.code.gossip.LogLevel;
import com.google.code.gossip.RemoteGossipMember;

/**
 * This class is an example of how one could use the gossip service.
 * Here we start multiple gossip clients on this host as specified in the config file.
 * 
 * @author harmenw
 */
public class GossipExample extends Thread {
	/** The number of clients to start. */
	private static final int NUMBER_OF_CLIENTS = 4;

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		new GossipExample();
	}
	
	/**
	 * Constructor.
	 * This will start the this thread.
	 */
	public GossipExample() {
		start();
	}

	/**
	 * @see java.lang.Thread#run()
	 */
	public void run() {
		try {
			GossipSettings settings = new GossipSettings();
			
			ArrayList<GossipService> clients = new ArrayList<GossipService>();
			
			// Get my ip address.
			String myIpAddress = InetAddress.getLocalHost().getHostAddress();
			
			// Create the gossip members and put them in a list and give them a port number starting with 2000.
			ArrayList<GossipMember> startupMembers = new ArrayList<GossipMember>();
			for (int i=0; i<NUMBER_OF_CLIENTS; ++i) {
				startupMembers.add(new RemoteGossipMember(myIpAddress, 2000+i));
			}
			
			// Lets start the gossip clients.
			// Start the clients, waiting cleaning-interval + 1 second between them which will show the dead list handling.
			for (GossipMember member : startupMembers) {
				GossipService gossipService = new GossipService(myIpAddress, member.getPort(), LogLevel.DEBUG, startupMembers, settings);
				clients.add(gossipService);
				gossipService.start();
				sleep(settings.getCleanupInterval() + 1000);
			}
			
			// After starting all gossip clients, first wait 10 seconds and then shut them down.
			sleep(10000);
			System.err.println("Going to shutdown all services...");
			// Since they all run in the same virtual machine and share the same executor, if one is shutdown they will all stop.
			clients.get(0).shutdown();
			
		} catch (UnknownHostException e) {
			e.printStackTrace();
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
	}
}
